Product Overview and Design Philosophy
The lined‑plastic series is a specialized corrosion‑ and wear‑resistant piping solution developed for the chemical, petrochemical, and light‑industry sectors, designed to withstand severe corrosive and erosive conditions at moderate temperatures. The products use carbon steel as the base material and employ advanced rotational molding, injection molding, and internal lining processes to line the inner walls of steel pipes with high‑performance thermoplastics such as polytetrafluoroethylene (Teflon), polyolefin PO, polyethylene PE, and polypropylene PP.
The product combines the steel substrate’s outstanding mechanical strength and pressure‑bearing capacity with the plastic liner’s excellent chemical stability and anti‑adhesive properties, effectively addressing key industry challenges such as severe corrosion, scaling, material adhesion, and shortened service life when conventional steel pipes are used to convey strong acids, strong alkalis, saline solutions, and various corrosive media.
Advanced manufacturing processes and structural advantages
Our company’s lined products are manufactured using mature and reliable processes, including negative-pressure lining, rotational molding, and hot-melt lamination. By precisely controlling lining temperature, pressure, molding time, and surface‑preparation conditions, we ensure that the plastic liner forms a uniform, dense, bubble‑free coating that bonds firmly to the steel pipe substrate.
The liner thickness can be customized according to actual operating conditions, ranging from 3 mm to 10 mm, and is suitable for a working temperature range of –60°C to 180°C (depending on the liner material). The plastic liner offers excellent impermeability, effectively preventing corrosive media from penetrating and corroding the steel pipe substrate.
The steel substrate and the plastic liner are tightly bonded, eliminating the risk of delamination, peeling, or cracking under conditions of thermal cycling, pressure fluctuations, and mechanical vibration.
Core Performance and Functional Features
The lined‑plastic product series boasts excellent corrosion resistance, non‑stick wall properties, and a low coefficient of friction. The high‑purity plastic lining can withstand most strong acids, strong alkalis, organic solvents, and corrosive gases, with a service life far superior to that of conventional carbon steel pipes, galvanized pipes, and stainless steel pipes.
The inner lining features a smooth, non‑stick surface that significantly reduces material adhesion and pipe scaling, lowers fluid resistance, enhances conveying efficiency, and decreases the frequency of equipment maintenance. Moreover, the plastic liner exhibits excellent wear resistance and impact strength, making it well suited to complex operating conditions characterized by corrosion, abrasion, and temperature fluctuations.
Compared with all-plastic pipes or high‑cost alloy pipes, lined‑plastic products deliver excellent corrosion resistance while significantly reducing overall procurement and operating costs, thereby generating substantial economic benefits for customers.
The entire product line and application areas
This series covers a complete range of lined products: lined elbows, lined tees, lined reducers, lined flanges, lined straight pipes, steel‑lined plastic pipelines, and various custom‑shaped lined pipe fittings.
It is widely used in industrial applications such as the conveyance of chemically corrosive media, the transport of pharmaceutical raw materials, chemical dosing pipelines for water treatment, flue‑gas desulfurization and denitrification systems in power plants, slurry transportation in mining operations, and clean piping for the food and beverage industries. It is particularly well suited to handling highly corrosive media, scaling‑prone materials, high‑purity conveying conditions, and critical pipelines with stringent contamination‑prevention requirements.
Rigorous quality control and customized services
All lined products are manufactured in strict compliance with international industry standards and company technical specifications. Prior to leaving the factory, each finished item undergoes a series of rigorous quality inspections, including lining thickness measurement, spark‑testing for pinholes, peel adhesion testing, dimensional accuracy verification, and visual‑quality inspection.
We can customize the lining material, liner thickness, pipe specifications, connection methods, and structural design to meet customers’ operating conditions, conveyed media, and equipment requirements, providing global industrial clients with a one-stop solution for corrosion‑resistant equipment that is reliable, durable, highly efficient, and cost‑effective.
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Plastic-lined wear-resistant straight pipe
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Hengtong Pipe Fittings Group
Hebei Hengtong Pipe Fitting Group manufactures steel fittings with integrated R&D, production, sales and services. With independent IP rights, we focus on two core product lines: concrete pump components and premium industrial pipe fittings.
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Phone:+86-13283241111
Email: rae@htpipefittings.com
howard@htpipefittings.com
Address: Zhenggang Industrial Park, Yanshan County, Cangzhou City, Hebei Province, China
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